appendix a fecal coliform and e. coli sampling ata …...draft final project report appendix a tmdls...

Draft Final Project Report Appendix A TMDLs for Fecal coliform in Corralitos and Salsipuedes Creeks

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APPENDIX A FECAL COLIFORM AND E. COLI SAMPLING DATA AND ANALYSIS SAMPLING DATA

CCAMP Fecal coliform Water Quality Data for Sampling Stations 305COR and 305COR2 (note: only data from 2003 to 2006 was used in data analysis for this Project Report)

Sampling Location Date

Fecal Coliform MPN/100 ml

12/18/97 5000 01/19/98 900 02/19/98 3000 03/12/98 80 05/27/98 80 06/30/98 70 07/31/98 300 09/03/98 240 09/30/98 2400 10/21/98 110 11/10/98 70 12/16/98 70 01/24/05 2400 02/22/05 300 03/23/05 2400 04/19/05 30 05/17/05 80 06/14/05 220 07/19/05 240 08/17/05 300 09/13/05 500 10/12/05 110 11/09/05 300 12/06/05 500 01/10/06 2300 02/21/06 80

305COR (Salsipuedes Creek

at Riverside Dr. Bridge)

03/14/06 3000 01/24/05 30 02/22/05 80 03/23/05 240 04/21/05 30 05/19/05 30000 06/16/05 500 07/21/05 130 12/08/05 80 01/12/06 50 02/23/06 130

305COR2 (Corralitos Creek at Browns Valley

Bridge)

03/16/06 300


2

Santa Cruz County Water Quality Data for Sampling Stations SCC1 and SCC2 (note: only data from 2003 to 2006 was used in data analysis for this Project Report)


Fecal Coliform

MPN/100 ml Sampling Location Date

Fecal Coliform

MPN/100 ml 11/19/75 15 09/14/93 220 12/16/75 6 09/21/93 260 01/28/76 110 09/28/93 155 03/22/76 28 10/05/93 48 06/29/76 475 10/13/93 3515 09/07/76 175 10/19/93 92 03/15/77 160 10/26/93 18 09/08/77 266 11/03/93 38 02/08/78 200 11/16/93 67 09/11/78 198 11/23/93 7 09/30/79 233 11/30/93 44 11/12/86 0 12/08/93 130 12/16/86 56 12/14/93 189 01/27/87 20 12/21/93 3 07/20/87 56 01/04/94 20 08/24/87 40 01/11/94 30 09/12/88 70 02/01/94 16 11/08/88 50 02/08/94 7 01/03/89 260 02/15/94 7 06/12/89 260 03/01/94 8 08/07/89 24 03/09/94 17 10/30/89 644 03/15/94 19 11/27/89 90 03/22/94 12 01/22/90 100 03/29/94 57 02/26/90 50 04/20/94 27 03/26/90 35 04/26/94 141 05/07/90 15 05/10/94 11 06/04/90 180 05/17/94 288 07/09/90 80 05/24/94 102 08/07/90 40 06/07/94 94 09/10/90 60 09/19/94 0 10/15/90 50 09/05/95 40 12/03/90 145 10/02/95 60 01/07/91 150 11/02/95 76 08/27/91 45 11/27/95 20 10/07/91 460 12/27/95 20 10/15/91 200 05/02/96 398 12/02/91 60 06/05/96 100 02/24/92 60 06/17/96 40 06/07/92 140 07/17/96 42 06/29/92 1220 01/07/97 10 08/03/92 60 03/17/98 10 08/31/92 60 05/12/99 36 10/19/92 80 06/01/99 150 10/26/92 200 07/12/99 70

SCC 1 (Corralitos Creek at

Rider Creek)

01/04/93 200


Rider Creek)

08/09/99 48


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Fecal Coliform


Fecal Coliform

MPN/100 ml 09/14/99 30 05/10/04 80 10/12/99 20 06/08/04 160 11/18/99 120 06/17/04 68 02/14/00 340 07/12/04 16 03/13/00 10 08/09/04 36 04/04/00 10 09/14/04 75 05/09/00 100 10/12/04 40 06/14/00 410 11/09/04 5 07/11/00 90 12/13/04 5 07/13/00 90 01/10/05 20 08/08/00 60 02/07/05 155 09/07/00 76 03/08/05 5 11/13/00 10 04/12/05 35 12/05/00 10 05/10/05 25 01/29/01 30 06/13/05 50 02/26/01 20 07/12/05 150 03/26/01 30 09/13/05 88 04/30/01 110 09/23/05 88 07/02/01 230 10/11/05 70 08/07/01 60 11/14/05 150 09/05/01 10 12/12/05 295 10/09/01 50 01/10/06 10 10/22/01 30 02/13/06 460 10/23/01 30 03/15/06 65 11/05/01 80 04/10/06 40 12/12/01 20 05/08/06 20 01/15/02 60 05/09/06 15 02/11/02 20 06/12/06 50 03/11/02 20 07/10/06 40 04/08/02 10 08/15/06 10 05/14/02 12 09/05/06 5 06/11/02 190 07/09/02 24 08/14/02 52 09/19/02 30 11/12/02 60 12/10/02 100 01/13/03 20 02/10/03 80 03/12/03 30 04/03/03 30 04/08-03 30 09/08-03 30 10/14/03 620 11/12/03 40 12/10/03 310 01/12/04 20 02/09/04 50 03/08/04 40


Rider Creek)

04/13/04 40

SCC 1 (Corralitos

Creek at Rider Creek)


4

04/14/04 30


Fecal Coliform


Fecal Coliform

MPN/100 ml 03/17/87 76 08/09/99 64 10/19/87 44 09/14/99 260 09/12/88 40 10/12/99 220 11/08/88 402 11/18/99 50 11/15/88 120 02/14/00 640 06/12/89 50 03/13/00 50 08/07/89 60 04/04/00 40 10/30/89 70 05/09/00 120 11/27/89 40 06/14/00 90 01/22/90 40 07/11/00 240 02/26/90 35 07/13/00 240 02/27/90 20 08/08/00 50 03/26/90 16 09/07/00 60 05/07/90 56 11/13/00 110 06/04/90 240 12/05/00 20 07/09/90 100 01/29/01 10 08/07/90 120 02/26/01 40 10/15/90 80 03/26/01 40 12/03/90 20 04/30/01 60 01/07/91 16 06/04/01 40 08/27/91 112 12/12/01 70 10/07/91 676 02/11/02 20 10/15/91 36 03/11/02 20 12/02/91 32 04/08/02 40 06/29/92 800 05/14/02 344 07/07/92 60 06/11/02 100 08/03/92 60 11/12/02 140 10/26/92 120 12/10/02 70 01/04/93 200 01/13/03 30 09/14/93 260 02/10/03 50 02/28/94 6 03/12/03 10 03/22/94 25 04/03/03 40 04/20/94 92 11/12/03 50 04/26/94 231 12/10/03 140 05/10/94 81 01/12/04 40 05/17/94 460 02/09/04 40 05/24/94 108 03/08/04 5 06/07/94 52 04/13/04 40 09/05/95 30 04/13/04 70 10/02/95 40 05/10/04 20 11/02/95 52 09/14/04 25 11/27/95 3.6 11/09/04 40 12/27/95 25 12/13/04 40 05/02/96 20 01/10/05 36 06/05/96 20 02/07/05 195 07/17/96 120 03/08/05 30 01/07/97 70 04/12/05 25 03/25/99 230 04/21/05 45

SCC 2 (Corralitos

Creek below Browns Valley Bridge)

05/12/99 24

SCC 2 (Corralitos

Creek below Browns Valley

Bridge)

05/10/05 220


5

06/01/99 50 06/13/05 135 07/12/99 60 07/12/05 305


Fecal Coliform


Fecal Coliform

MPN/100 ml 09/13/05 64 12/12/05 150 01/10/06 55 02/13/06 965 03/15/06 95 04/10/06 120 05/08/06 120 05/09/06 75 06/12/06 80 07/10/06 80 08/15/06 85 09/05/06 1340

SCC 2 (Corralitos

Creek below Browns Valley Bridge)

10/11/06 5


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Coastal Watershed Council E. coli Water Quality Data for Sampling Locations SALSI 21 and CORRA 23


E. coli MPN/100 ml

11/05/03 662 03/08/04 161 05/26/04 185 07/06/04 226 08/12/04 285 09/22/04 243 10/07/04 437

SALSI 21

11/08/04 20 11/05/03 322 03/08/04 20 05/26/04 441 07/06/04 1333 08/12/04 201 09/22/04 855 10/07/04 4611

CORRA 23

11/08/04 187


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City of Watsonville Fecal coliform Water Quality Data for Corralitos and Salsipuedes Creeks


Fecal Coliform


Fecal Coliform

MPN/100 ml 01/03 80 04/03 140 02/03 110 05/03 240 03/03 170 06/03 80 04/03 130 07/03 50 05/03 240 08/03 50 06/03 500 09/03 50 07/03 300 10/03 30 08/03 80 11/03 1600 09/03 170 12/03 50 10/03 170 01/04 23 11/03 240 02/04 170 12/03 23 03/04 30 01/04 140 04/04 50 02/04 2400 05/04 80 03/04 110 06/04 240 04/04 130 07/04 30 05/04 130 08/04 30 06/04 500 09/04 240 07/04 110 10/04 70 08/04 110 11/04 30 09/04 500 12/04 140 10/04 130 01/05 75 11/04 130 02/05 107 12/04 23 03/05 31 01/05 54 04/05 187 02/05 88 05/05 147 03/05 58 06/05 51 04/05 79 07/05 43 05/05 142 08/05 74 06/05 173 09/05 29 07/05 582 10/05 49 08/05 81 11/05 11 09/05 55 12/05 34 10/05 119 01/06 22 11/05 23 02/06 32 12/05 40 03/06 525 01/06 10 04/06 576 02/06 11 03/06 134

ECI (Eureka Canyon Intake)

04/06 273 01/03 50 02/03 110

BVI (Browns Valley Intake)

03/03 80

BVI (Browns Valley Intake)


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City of Watsonville E. coli Water Quality Data for Corralitos and Salsipuedes Creeks

Sampling Location Date E. coli

MPN/100 ml

CC-1 (Corralitos Creek at Green Valley Rd) 01/04/05 55 CC-2 (Corralitos Creek just upstream of Salsipuedes Cr.) 01/04/05 64 CC-3 (Salsipuedes Creek at Lake Ave.) 01/04/05 109 CC-4 (Salsipuedes Creek at Riverside Drive Bridge) 01/04/05 234 CC-5 (Salsipuedes Creek just upstream of Pajaro River Confluence) 01/04/05 203 CC-1 (Corralitos Creek at Green Valley Rd) 01/12/05 38 CC-2 (Corralitos Creek just upstream of Salsipuedes Cr.) 01/12/05 75 CC-3 (Salsipuedes Creek at Lake Ave.) 01/12/05 58 CC-4 (Salsipuedes Creek at Riverside Drive Bridge) 01/12/05 171 CC-5 (Salsipuedes Creek just upstream of Pajaro River Confluence) 01/12/05 226 CC-1 (Corralitos Creek at Green Valley Rd) 01/19/05 39 CC-2 (Corralitos Creek just upstream of Salsipuedes Cr.) 01/19/05 64 CC-3 (Salsipuedes Creek at Lake Ave.) 01/19/05 81 CC-4 (Salsipuedes Creek at Riverside Drive Bridge) 01/19/05 39 CC-5 (Salsipuedes Creek just upstream of Pajaro River Confluence) 01/19/05 53 CC-1 (Corralitos Creek at Green Valley Rd) 01/26/05 * 3448 CC-2 (Corralitos Creek just upstream of Salsipuedes Cr.) 01/26/05 * 2909 CC-3 (Salsipuedes Creek at Lake Ave.) 01/26/05 * 1956 CC-4 (Salsipuedes Creek at Riverside Drive Bridge) 01/26/05 * 2723 CC-5 (Salsipuedes Creek just upstream of Pajaro River Confluence) 01/26/05 * 4106 CC-1 (Corralitos Creek at Green Valley Rd) 02/02/05 215 CC-2 (Corralitos Creek just upstream of Salsipuedes Cr.) 02/02/05 69 CC-3 (Salsipuedes Creek at Lake Ave.) 02/02/05 91 CC-4 (Salsipuedes Creek at Riverside Drive Bridge) 02/02/05 144 CC-5 (Salsipuedes Creek just upstream of Pajaro River Confluence) 02/02/05 154 CC-1 (Corralitos Creek at Green Valley Rd) 02/09/05 85 CC-2 (Corralitos Creek just upstream of Salsipuedes Cr.) 02/09/05 110 CC-3 (Salsipuedes Creek at Lake Ave.) 02/09/05 92 CC-4 (Salsipuedes Creek at Riverside Drive Bridge) 02/09/05 646

CC-5 (Salsipuedes Creek just upstream of Pajaro River Confluence) 02/09/05 621 * Field notes indicated rain event during sampling on January 26, 05


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DATA ANALYSIS Staff used two methods to analyze fecal coliform and E. coli water quality data. Staff analyzed the fecal coliform data using a program titled “Fecal Coliform Investigation and Analysis Spreadsheet” (FECIA; Riverson, 2003). FECIA is a fully automated spreadsheet designed to assist in characterization and quantification of fecal coliform instream water quality objective exceedances. Staff compared the observed data against specified values equal to water quality objectives to determine the magnitude and nature of exceedances. Staff used the FECIA program to generate the data analysis figures and tables contained in this section of the appendix. Figures display the water contact recreation beneficial use maximum water quality objective for fecal coliform only (as a bold horizontal line). Staff determined, none of the samples collected amounted to greater than five in a 30-day period, the rate necessary to calculate a geometric mean. Therefore, staff did not use the geometric mean water quality objective for fecal coliform. Staff used a second method, an Excel spread sheet, for analyzing E. coli data. Staff calculated the geomean for each set of five samples in a 30-day period. Staff also used Excel to calculate the percent of exceedances for data sets of less than five samples in a 30-day period. Two Coastal Watershed Council E. coli sample sets contained eight samples collected in an approximate one-year period. In this case, staff used Excel to calculate the geomean of all eight samples at each location. Although there was not enough data to analyze according to USEPA water quality criteria, staff felt the analysis was sufficient for indicating the presence or absence of high levels of indicator bacteria. Statistics that staff generated from the analysis are included in this section of the appendix. Tables below each figure display statistical data on a monthly basis including the mean, median, minimum, maximum, number of exceedances of the water contact recreation water quality objective versus the sample count (XS:Count), and the percent sample exceedance (XS%) of the water quality objective. Note that when the table analyzed geometric means, the column entitled “mean” was actually the “mean of the geometric mean.” The mean value for the maximum water quality objective or criterion is the actual mean value of the samples collected.


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CCAMP data: Salsipuedes Creek at Riverside Drive Bridge (305 COR)

Geometric Mean Water Quality Objective (200 MPN/100 ml)

There was not enough water quality data collected at the Salsipuedes Creek at Riverside Drive Bridge sampling station to calculate geometric means.


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CCAMP data: Salsipuedes Creek at Riverside Drive Bridge (305 COR)

Maximum Water Quality Objective (400 MPN/100 ml)

Figure 1. Salsipuedes Creek at Riverside Drive Bridge Fecal Coliform (#/100 ml) and Water Contact Maximum Water Quality Objective (January 05 through March 2006)

Table 1. Salsipuedes Creek at Riverside Drive Bridge Fecal Coliform (#/100 ml) Data Summary and Exceedance of Water Contract Recreation Maximum Water Quality Objective

Month Mean Median Min Max 25th 75th XS:Count XS%Jan 2350 2350 2300 2400 2325 2375 2:2 100%Feb 190 190 80 300 135 245 0:2 0%Mar 2700 2700 2400 3000 2550 2850 2:2 100%Apr 30 30 30 30 30 30 0:1 0%May 80 80 80 80 80 80 0:1 0%Jun 220 220 220 220 220 220 0:1 0%Jul 240 240 240 240 240 240 0:1 0%Aug 300 300 300 300 300 300 0:1 0%Sep 500 500 500 500 500 500 1:1 100%Oct 110 110 110 110 110 110 0:1 0%Nov 300 300 300 300 300 300 0:1 0%Dec 500 500 500 500 500 500 1:1 100%

All Data 851 300 30 3000 165 1400 6:15 40%

Summary Statistics ( Data: 1/24/2005 3:53:00 PM to 3/14/2006 1:28:00 PM )

1

10

100

1000

10000

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Feca

l Col

iform

25th-75th Percentile Mean, Min, Max Median Not-To-Exceed Standard


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CCAMP data: Corralitos Creek at Browns Valley Bridge (305 COR2)


There was not enough water quality data collected at the Corralitos Creek at Browns Valley Bridge sampling station to calculate geometric means.


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CCAMP Data: Corralitos Creek at Browns Valley Bridge (305 COR2)


Figure 2. Corralitos Creek at Browns Valley Bridge Fecal Coliform (#/100 ml) and Water Contact Maximum Water Quality Objective (January 05 through March 2006)

Table 2. Corralitos Creek at Browns Valley Bridge Fecal Coliform (#/100 ml) Data Summary and Exceedance of Water Contract Recreation Maximum Water Quality Objective

Month Mean Median Min Max 25th 75th XS:Count XS%Jan 40 40 30 50 35 45 0:2 0%Feb 105 105 80 130 93 118 0:2 0%Mar 270 270 240 300 255 285 0:2 0%Apr 30 30 30 30 30 30 0:1 0%May 30000 30000 30000 30000 30000 30000 1:1 100%Jun 500 500 500 500 500 500 1:1 100%Jul 130 130 130 130 130 130 0:1 0%Aug 0 0 0 0 0 0 0:0 n/aSep 0 0 0 0 0 0 0:0 n/aOct 0 0 0 0 0 0 0:0 n/aNov 0 0 0 0 0 0 0:0 n/aDec 80 80 80 80 80 80 0:1 0%

All Data 2870 130 30 30000 65 270 2:11 18%

Summary Statistics ( Data: 1/24/2005 2:26:00 PM to 3/16/2006 11:06:00 AM )

0.01

0.1

1

10

100

1000

10000

100000


Feca

l col

iform



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Santa Cruz County Data: Corralitos Creek at Rider Creek (SCC1)


There was not enough water quality data collected at the Corralitos Creek at Rider Creek sampling station to calculate geometric means.


15

Santa Cruz County Data: Corralitos Creek at Rider Creek (SCC1)


1

10

100

1000


Feca

l Col

iform


Figure 3. Corralitos Creek at Rider Creek Fecal Coliform (#/100 ml) and Water Contact Maximum Water Quality Objective (periodically from January 2003 through October 2006)

Table 3. Corralitos Creek at Rider Creek Fecal Coliform (#/100 ml) Data Summary and Exceedance of Water Contract Recreation Maximum Water Quality Objective


All Data 81 40 5 620 20 79 2:46 4%

Summary Statistics ( Data: 1/13/2003 to 10/11/2006 )


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Santa Cruz County Data: Corralitos Creek at Browns Valley Bridge (SCC2)


There was not enough water quality data collected at the Corralitos Creek at the Browns Valley Bridge sampling station to calculate geometric means.


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Santa Cruz County Data: Corralitos Creek at Browns Valley Bridge (SCC2)


Figure 4. Corralitos Creek at Browns Valley Bridge Fecal Coliform (#/100 ml) and Water Contact Maximum Water Quality Objective (periodically from January 2003 through October 2006)

Table 4. Corralitos Creek at Browns Valley Bridge Fecal Coliform (#/100 ml) Data Summary and Exceedance of Water Contract Recreation Maximum Water Quality Objective

1

10

100

1000

10000


Fecal Coliform



All Data 135 53 5 1340 39 120 2:36 6%

Summary Statistics ( Data: 1/13/2003 to 10/11/2006 )


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Coastal Watershed Council Data: Corralitos Creek at Pista Lane/7226 Freedom Blvd. and Salsipuedes Creek at East Lake Avenue Bridge (SALSI 21 and CORRA 23)


Table 5. Corralitos Creek at Pista Lane/7226 Freedom Blvd. and Salsipuedes Creek at East Lake Avenue Bridge E. coli (#/100 ml) Data Summary and Geometric Mean of all 8 samples at each location (periodically from November 2003 through November 2004).

Location Date E. coli Geomean

11/05/03 322 03/08/04 20 05/26/04 441

CORRA 23 (Corralitos Creek At Pista Lane/7226 Freedom Blvd.) 07/06/04 1333 08/12/04 201 09/22/04 855 10/07/04 4611 11/08/04 187 392

11/05/03 662 03/08/04 161

SALSI 21 (Salispuedes Creek at East Lake Avenue Bridge) 05/26/04 185 07/06/04 226 08/12/04 285 09/22/04 243 10/07/04 437 11/08/04 20 201


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City of Watsonville Data: Browns Valley Intake (BVI) Geometric Mean Water Quality Objective (200 MPN/100 ml)

There was not enough water quality data collected at the Browns Valley Intake sampling station to calculate geometric means.


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City of Watsonville Data: Browns Valley Intake (BVI) Maximum Water Quality Objective (400 MPN/100 ml)

Figure 5. Corralitos Creek at Browns Valley Intake Fecal Coliform (#/100 ml) and Water Contact Maximum Water Quality Objective (January 2003 through April 2006)

Table 6. Corralitos Creek at Browns Valley Intake Fecal Coliform (#/100 ml) Data Summary and Exceedance of Water Contract Recreation Maximum Water Quality Objective

1

10

100

1000

10000


Feca

l Col

iform



All Data 141 51 11 1600 32 140 3:40 8%

Summary Statistics ( Data: 1/3/2003 to Sep-05 )


21

City of Watsonville Data: Eureka Canyon Intake (ECI) Geometric Mean Water Quality Objective (200 MPN/100 ml)

There was not enough water quality data collected at the Eureka Canyon Intake sampling station to calculate geometric means.


22

City of Watsonville Data: Eureka Canyon Intake (ECI) Maximum Water Quality Objective (400 MPN/100 ml)

Figure 6. Corralitos Creek at Eureka Canyon Intake Fecal Coliform (#/100 ml) and Water Contact Maximum Water Quality Objective (January 2003 through April 2006) Table 7. Corralitos Creek at Eureka Canyon Intake Fecal Coliform (#/100 ml) Data Summary and Exceedance of Water Contract Recreation Maximum Water Quality Objective

1

10

100

1000

10000


Feca

l Col

iform



All Data 214 130 10 2400 80 171 5:40 13%

Summary Statistics ( Data: 1/3/2003 to Sep-05 )


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City of Watsonville Data: Downstream Sampling Locations (CC1 through CC5)


Table 8. Downstream sampling locations E. coli (#/100 ml) Data Summary and Geometric Mean (periodically from November 2003 through November 2004)

Date Sampling Location E. coli

E. coli MPN/100 ml Geomean

Sample Set 1 (first five

samples at each location)

E. coli MPN/100 ml Geomean

Sample Set 2 (last five

samples at each location)

01/04/05 CC-1 55 01/12/05 CC-1 38 01/19/05 CC-1 39

01/26/05* CC-1 3448 02/02/05 CC-1 215 143 02/09/05 CC-1 85 156 01/04/05 CC-2 64 01/12/05 CC-2 75 01/19/05 CC-2 64

01/26/05* CC-2 2909 02/02/05 CC-2 69 144 02/09/05 CC-2 110 160 01/04/05 CC-3 109 01/12/05 CC-3 58 01/19/05 CC-3 81

01/26/05* CC-3 1956 02/02/05 CC-3 91 156 02/09/05 CC-3 92 150 01/04/05 SC-4 234 01/12/05 SC-4 171 01/19/05 SC-4 39

01/26/05* SC-4 2723 02/02/05 SC-4 144 228 02/09/05 SC-4 646 279 01/04/05 SC-5 203 01/12/05 SC-5 226 01/19/05 SC-5 53

01/26/05* SC-5 4106 02/02/05 SC-5 154 274 02/09/05 SC-5 621 342 * Field notes indicated rain event during sampling on January 26, 05

appendix a fecal coliform and e. coli sampling ata …...draft final project report appendix a tmdls...

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